We found same issue on several devices (running Debian Whezzy with kernel 3.14)
But. we have many other "same" device with this firmware reported from psmouse: [ 9.906882] psmouse serio4: elantech: assuming hardware version 3 (with firmware version 0x450f02) [ 9.920408] psmouse serio4: elantech: Synaptics capabilities query result 0x09, 0x16, 0x09. i down know if same touch hardware with different firmware or the hardware is no same On the firmware 0x450f02 the problem does not happen Do you have a bios update to try? I will contact to our vendor to ask if bios update can be fix the buggie devices. on windows with 0x354f01 the issue is little different, the touchpad freeze few seconds and work again. # dmidecode 2.11 # SMBIOS entry point at 0x79269000 SMBIOS 2.7 present. 33 structures occupying 1568 bytes. Table at 0x79268000. Handle 0x0000, DMI type 0, 24 bytes BIOS Information Vendor: Phoenix Technologies Ltd. Version: MPBYT10A.86A.0023.2014.0317.1155 Release Date: 03/17/2014 Address: 0xE0000 Runtime Size: 128 kB ROM Size: 4096 kB Characteristics: PCI is supported BIOS is upgradeable BIOS shadowing is allowed Boot from CD is supported Selectable boot is supported NEC PC-98 ACPI is supported USB legacy is supported BIOS boot specification is supported Function key-initiated network boot is supported Targeted content distribution is supported UEFI is supported BIOS Revision: 0.1 Firmware Revision: 1.0 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1369684 Title: Elantech touchpad locks cursor when touching with 2 or more fingers Status in The Linux Kernel: New Status in “linux” package in Ubuntu: Confirmed Bug description: Running Ubuntu 14.04.1, Unity desktop, kernel 3.13.0-35 generic on Intel Classmate, MG Pupil 109 The touchpad is identified in dmesg as [ 1.539535] mousedev: PS/2 mouse device common for all mice [ 2.528608] psmouse serio4: elantech: assuming hardware version 3 (with firmware version 0x354f01) [ 2.541184] psmouse serio4: elantech: Synaptics capabilities query result 0x39, 0x16, 0x09. The cursor locks when you touch the touchpad with 2 or more fingers. The only way I found to get it loose is reboot or suspend and resume. modprobe -r psmouse modprobe psmouse doesn' t work, also not with proto=auto In systemsettings I disabled 2 finger scrolling without result In dmesg I see messages like "psmouse serio4: Touchpad at isa0060/serio4/input0 lost synchronization, throwing 5 bytes away during normal operation". The number of bytes can be 4 too. When the cursor locks up, I don't see such a message. Nothing is reported in dmesg. Doing some research, I've learned that the touchpad should support multi touch. Off course that doesn't work, since touching the pad with more fingers makes it lock. Any help much appreciated. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-35-generic 3.13.0-35.62 ProcVersionSignature: Ubuntu 3.13.0-35.62-generic 3.13.11.6 Uname: Linux 3.13.0-35-generic x86_64 ApportVersion: 2.14.1-0ubuntu3.2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: test 1474 F.... pulseaudio Date: Mon Sep 15 20:00:38 2014 HibernationDevice: RESUME=UUID=6f2e0704-c6a4-4f89-b357-c8e46ff9d0ec InstallationDate: Installed on 2014-09-15 (0 days ago) InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2) MachineType: Intel Corporation Intel powered classmate PC ProcEnviron: LANGUAGE=nl_BE:nl TERM=xterm PATH=(custom, no user) LANG=nl_BE.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-35-generic.efi.signed root=UUID=40917190-7ade-42d5-a5d2-91f8c497278e ro quiet splash vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-3.13.0-35-generic N/A linux-backports-modules-3.13.0-35-generic N/A linux-firmware 1.127.5 SourcePackage: linux StagingDrivers: rts5139 UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 04/21/2014 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: MPBYT10A.90A.0029.2014.0421.1908 dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: Intel powered classmate PC dmi.board.vendor: Intel Corporation dmi.board.version: Clamshell dmi.chassis.asset.tag: Asset Tag dmi.chassis.type: 11 dmi.chassis.vendor: Intel Corporation dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrMPBYT10A.90A.0029.2014.0421.1908:bd04/21/2014:svnIntelCorporation:pnIntelpoweredclassmatePC:pvrClamshell:rvnIntelCorporation:rnIntelpoweredclassmatePC:rvrClamshell:cvnIntelCorporation:ct11:cvr0.1: dmi.product.name: Intel powered classmate PC dmi.product.version: Clamshell dmi.sys.vendor: Intel Corporation To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1369684/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp